考虑灵敏度一致性的外网静态等值新理论研究  

New Theory on External Network Static Equivalent Based on Sensitivity Consistency

作　　者：余娟[1] 张勉[1] 朱柳[1] 颜伟[1] 赵霞[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2013年第10期64-70,17,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51007098;51177178);输配电装备及系统安全与新技术国家重点实验室自主研究课题(2007DA10512712203)~~

摘　　要：提出一种新的外网静态等值理论,该理论不仅可以保证等值前后系统潮流状态的一致性,还能保证如下两类灵敏度关系在等值前后的一致性:非发电机节点电压与发电机节点电压之间的灵敏度关系、非发电机节点电压与非发电机节点注入电流之间的灵敏度关系。已有的外网静态等值方法往往只能保证潮流状态的一致性,所以文中所提等值理论更为严格,从而能获得更高的外网等值精度。基于节点电压方程,以潮流状态和两类灵敏度关系在等值前后应保持一致为前提条件,结合Ward等值理论推导所提外网静态等值网络及其参数。IEEE39节点系统和广东电网的仿真结果表明所提理论的准确性和有效性。A new theory on external network static equivalent was proposed. This theory ensured that before and after the equivalent, not only the power flow states of internal network kept equal, but also the following sensitivities remained consistent： non-generator node voltages with regard to generator node voltages and non-generator node voltages with regard to non-generator injected currents. Generally, the existing equivalent methods only considered the consistency of power flow states, so the new theory was stricter and had more accurate results of external network static equivalent. Based on nodal voltage equations and Ward equivalent theory, the equivalent network and parameters of the new theory were derived, which satisfied the consistency in both power flow states and the two sensitivities. The simulation results of IEEE39 system and Guangdong power system shows the accuracy and effectiveness of the theory.

关 键 词：外网静态等值 灵敏度 WARD等值 静态安全分析 

分 类 号：TM74[电气工程—电力系统及自动化]